Same, .900 dia. as the Neuvo. From what I understand it has steel inserts (as per Alex post).
As per
@Alex Wheeler
Some features that are unique to this action... It has a 75 degree bolt throw, but its still a 6 and 12 o'clock lug position in lock up. You can do that with a full diameter bolt, not a standard 2 lug with horizontal lug ways. See the pics to understand.
My favorite thing about it is the closing cams. By shortening the closing cams (the extraction cam follows as well) it allows you to widen the cocking cam on the bolt. Which makes for a sallower angle and easier bolt open. This action opens like a 90 degree even though its a 75. And you do not sacrifice timing. This is the best timed action out of the box I have felt.
Obviously this is an aluminum body action with steel inserts. Its actually slicker than a steel body, just like the aluminum Nuevo.
This one they just sent me is the latest version. There were some internal changes to improve ejection. With those short cams you do have to compress the ejector before you can close the bolt so a light spring is important for feel. Now ejection is 100% no matter what. They also made some other small tweaks. The current version is a very nice action if you like a smaller port and stroke.